IR spectral characteristics of tourmalines with the same direction;

Heat treatment on Fe-Li tourmaline from Keketuohai,Xinjiang,are carried out and the main colour-altered technology parameters are obtained,including the experimental temperature,the atmosphere,the holding time,the velocity of heating and cooling during the heat treatment.

Starting from the cutting property and species classification of tourmaline,the technological requirement was discussed with a focus on orientation design as well as the relationship between cutting machine,clamp and grinding materials in the whole process of design,division,pr.